The late physicist Richard Feynman famously won a Nobel Prize for his work on quantum electrodynamics. But here’s something most people don’t know about him: He was also a world-class safecracker. via Pocket

"Ultimately, risk management is a numbers game; you multiply a wild-ass guess by a fudge factor. Worse, the potential cost of failure is estimated in as a factor, too. So you're trying to balance an unjustified estimate of cost of failure against a wild-ass guess multiplied by a fudge factor."